That very well could have been my 50mm now that you mention it. Doesn't look quite wide enough to be 35mm.
Though it's hard to tell with the background blacked out. The 35 distorts, 50 does not.
Edit - I've changed my mind. That's def 35mm, and the camera is full frame, btw!
Just because It's come up before, it's a Rebel Ti, or EOS 300v.